Interesting idea. But it gets quite boring after one or two levels. Maybe shorten it to 10/15 seconds as 60 is way to long and players will most likely get bored and quit after a few levels. A better tutorial would also be better as bombariding the player with alot of text at once is a bit much. Maybe take it one step at a time, first introduce the sun meter, then the water meter and then the way to gain sun/water etc.
I could see this actually becoming a pretty fun and franctic game about balancing your sun/water meters.
Also how does this game fit in with the theme? Just wondering as I didn't quite understand how it fit the theme.